Advice for selling lens

I have a question about the 85-210/3.5 as I have this rare lens and close-up lens in original box in excellent condition but don't find myself using it at all. Realising this lens is more of a collector's item (K 85-210/3.5), I've decided to sell it.

Where would be the best place to put it up for sale and where would collectors find my link easily? I'm based in London.

I would be happy if it could go to a collector who hasn't got this one for his/her collection of K-serie lenses.
Any input is welcome!

We have a Classified Ads section here on the forum. Post there, with pictures and giving your asking price and see what happens.

I would use ebay to check what the same lens, in similar condition has sold for in the past and then put it up for sale on the forum here.

Very rare lens and expensive in it's day. I've got the f/4.5 version purely for nostalgic reasons because the M42 version was the first zoom I ever bought for a Spotmatic. The M42 f/4.5 version cost around £2,800 in today's money in 1970.

The f/4.5 is a good performer and I would imagine the f/3.5 to be even better. Ebay's the only place to give any indication of value. I would imagine £120 upwards.

Quite long lenses by today's standards.
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